/*
 * MinIO Javascript Library for Amazon S3 Compatible Cloud Storage, (C) 2016 MinIO, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import * as crypto from "crypto";
import * as errors from "./errors.mjs";
import { getScope, isNumber, isObject, isString, makeDateLong, makeDateShort, uriEscape } from "./internal/helper.mjs";
const signV4Algorithm = 'AWS4-HMAC-SHA256';

// getCanonicalRequest generate a canonical request of style.
//
// canonicalRequest =
//  <HTTPMethod>\n
//  <CanonicalURI>\n
//  <CanonicalQueryString>\n
//  <CanonicalHeaders>\n
//  <SignedHeaders>\n
//  <HashedPayload>
//
function getCanonicalRequest(method, path, headers, signedHeaders, hashedPayload) {
  if (!isString(method)) {
    throw new TypeError('method should be of type "string"');
  }
  if (!isString(path)) {
    throw new TypeError('path should be of type "string"');
  }
  if (!isObject(headers)) {
    throw new TypeError('headers should be of type "object"');
  }
  if (!Array.isArray(signedHeaders)) {
    throw new TypeError('signedHeaders should be of type "array"');
  }
  if (!isString(hashedPayload)) {
    throw new TypeError('hashedPayload should be of type "string"');
  }
  const headersArray = signedHeaders.reduce((acc, i) => {
    // Trim spaces from the value (required by V4 spec)
    const val = `${headers[i]}`.replace(/ +/g, ' ');
    acc.push(`${i.toLowerCase()}:${val}`);
    return acc;
  }, []);
  const requestResource = path.split('?')[0];
  let requestQuery = path.split('?')[1];
  if (!requestQuery) {
    requestQuery = '';
  }
  if (requestQuery) {
    requestQuery = requestQuery.split('&').sort().map(element => !element.includes('=') ? element + '=' : element).join('&');
  }
  return [method.toUpperCase(), requestResource, requestQuery, headersArray.join('\n') + '\n', signedHeaders.join(';').toLowerCase(), hashedPayload].join('\n');
}

// generate a credential string
function getCredential(accessKey, region, requestDate, serviceName = 's3') {
  if (!isString(accessKey)) {
    throw new TypeError('accessKey should be of type "string"');
  }
  if (!isString(region)) {
    throw new TypeError('region should be of type "string"');
  }
  if (!isObject(requestDate)) {
    throw new TypeError('requestDate should be of type "object"');
  }
  return `${accessKey}/${getScope(region, requestDate, serviceName)}`;
}

// Returns signed headers array - alphabetically sorted
function getSignedHeaders(headers) {
  if (!isObject(headers)) {
    throw new TypeError('request should be of type "object"');
  }
  // Excerpts from @lsegal - https://github.com/aws/aws-sdk-js/issues/659#issuecomment-120477258
  //
  //  User-Agent:
  //
  //      This is ignored from signing because signing this causes problems with generating pre-signed URLs
  //      (that are executed by other agents) or when customers pass requests through proxies, which may
  //      modify the user-agent.
  //
  //  Content-Length:
  //
  //      This is ignored from signing because generating a pre-signed URL should not provide a content-length
  //      constraint, specifically when vending a S3 pre-signed PUT URL. The corollary to this is that when
  //      sending regular requests (non-pre-signed), the signature contains a checksum of the body, which
  //      implicitly validates the payload length (since changing the number of bytes would change the checksum)
  //      and therefore this header is not valuable in the signature.
  //
  //  Content-Type:
  //
  //      Signing this header causes quite a number of problems in browser environments, where browsers
  //      like to modify and normalize the content-type header in different ways. There is more information
  //      on this in https://github.com/aws/aws-sdk-js/issues/244. Avoiding this field simplifies logic
  //      and reduces the possibility of future bugs
  //
  //  Authorization:
  //
  //      Is skipped for obvious reasons

  const ignoredHeaders = ['authorization', 'content-length', 'content-type', 'user-agent'];
  return Object.keys(headers).filter(header => !ignoredHeaders.includes(header)).sort();
}

// returns the key used for calculating signature
function getSigningKey(date, region, secretKey, serviceName = 's3') {
  if (!isObject(date)) {
    throw new TypeError('date should be of type "object"');
  }
  if (!isString(region)) {
    throw new TypeError('region should be of type "string"');
  }
  if (!isString(secretKey)) {
    throw new TypeError('secretKey should be of type "string"');
  }
  const dateLine = makeDateShort(date);
  const hmac1 = crypto.createHmac('sha256', 'AWS4' + secretKey).update(dateLine).digest(),
    hmac2 = crypto.createHmac('sha256', hmac1).update(region).digest(),
    hmac3 = crypto.createHmac('sha256', hmac2).update(serviceName).digest();
  return crypto.createHmac('sha256', hmac3).update('aws4_request').digest();
}

// returns the string that needs to be signed
function getStringToSign(canonicalRequest, requestDate, region, serviceName = 's3') {
  if (!isString(canonicalRequest)) {
    throw new TypeError('canonicalRequest should be of type "string"');
  }
  if (!isObject(requestDate)) {
    throw new TypeError('requestDate should be of type "object"');
  }
  if (!isString(region)) {
    throw new TypeError('region should be of type "string"');
  }
  const hash = crypto.createHash('sha256').update(canonicalRequest).digest('hex');
  const scope = getScope(region, requestDate, serviceName);
  const stringToSign = [signV4Algorithm, makeDateLong(requestDate), scope, hash];
  return stringToSign.join('\n');
}

// calculate the signature of the POST policy
export function postPresignSignatureV4(region, date, secretKey, policyBase64) {
  if (!isString(region)) {
    throw new TypeError('region should be of type "string"');
  }
  if (!isObject(date)) {
    throw new TypeError('date should be of type "object"');
  }
  if (!isString(secretKey)) {
    throw new TypeError('secretKey should be of type "string"');
  }
  if (!isString(policyBase64)) {
    throw new TypeError('policyBase64 should be of type "string"');
  }
  const signingKey = getSigningKey(date, region, secretKey);
  return crypto.createHmac('sha256', signingKey).update(policyBase64).digest('hex').toLowerCase();
}

// Returns the authorization header
export function signV4(request, accessKey, secretKey, region, requestDate, sha256sum, serviceName = 's3') {
  if (!isObject(request)) {
    throw new TypeError('request should be of type "object"');
  }
  if (!isString(accessKey)) {
    throw new TypeError('accessKey should be of type "string"');
  }
  if (!isString(secretKey)) {
    throw new TypeError('secretKey should be of type "string"');
  }
  if (!isString(region)) {
    throw new TypeError('region should be of type "string"');
  }
  if (!accessKey) {
    throw new errors.AccessKeyRequiredError('accessKey is required for signing');
  }
  if (!secretKey) {
    throw new errors.SecretKeyRequiredError('secretKey is required for signing');
  }
  const signedHeaders = getSignedHeaders(request.headers);
  const canonicalRequest = getCanonicalRequest(request.method, request.path, request.headers, signedHeaders, sha256sum);
  const serviceIdentifier = serviceName || 's3';
  const stringToSign = getStringToSign(canonicalRequest, requestDate, region, serviceIdentifier);
  const signingKey = getSigningKey(requestDate, region, secretKey, serviceIdentifier);
  const credential = getCredential(accessKey, region, requestDate, serviceIdentifier);
  const signature = crypto.createHmac('sha256', signingKey).update(stringToSign).digest('hex').toLowerCase();
  return `${signV4Algorithm} Credential=${credential}, SignedHeaders=${signedHeaders.join(';').toLowerCase()}, Signature=${signature}`;
}
export function signV4ByServiceName(request, accessKey, secretKey, region, requestDate, contentSha256, serviceName = 's3') {
  return signV4(request, accessKey, secretKey, region, requestDate, contentSha256, serviceName);
}

// returns a presigned URL string
export function presignSignatureV4(request, accessKey, secretKey, sessionToken, region, requestDate, expires) {
  if (!isObject(request)) {
    throw new TypeError('request should be of type "object"');
  }
  if (!isString(accessKey)) {
    throw new TypeError('accessKey should be of type "string"');
  }
  if (!isString(secretKey)) {
    throw new TypeError('secretKey should be of type "string"');
  }
  if (!isString(region)) {
    throw new TypeError('region should be of type "string"');
  }
  if (!accessKey) {
    throw new errors.AccessKeyRequiredError('accessKey is required for presigning');
  }
  if (!secretKey) {
    throw new errors.SecretKeyRequiredError('secretKey is required for presigning');
  }
  if (!isNumber(expires)) {
    throw new TypeError('expires should be of type "number"');
  }
  if (expires < 1) {
    throw new errors.ExpiresParamError('expires param cannot be less than 1 seconds');
  }
  if (expires > 604800) {
    throw new errors.ExpiresParamError('expires param cannot be greater than 7 days');
  }
  const iso8601Date = makeDateLong(requestDate);
  const signedHeaders = getSignedHeaders(request.headers);
  const credential = getCredential(accessKey, region, requestDate);
  const hashedPayload = 'UNSIGNED-PAYLOAD';
  const requestQuery = [];
  requestQuery.push(`X-Amz-Algorithm=${signV4Algorithm}`);
  requestQuery.push(`X-Amz-Credential=${uriEscape(credential)}`);
  requestQuery.push(`X-Amz-Date=${iso8601Date}`);
  requestQuery.push(`X-Amz-Expires=${expires}`);
  requestQuery.push(`X-Amz-SignedHeaders=${uriEscape(signedHeaders.join(';').toLowerCase())}`);
  if (sessionToken) {
    requestQuery.push(`X-Amz-Security-Token=${uriEscape(sessionToken)}`);
  }
  const resource = request.path.split('?')[0];
  let query = request.path.split('?')[1];
  if (query) {
    query = query + '&' + requestQuery.join('&');
  } else {
    query = requestQuery.join('&');
  }
  const path = resource + '?' + query;
  const canonicalRequest = getCanonicalRequest(request.method, path, request.headers, signedHeaders, hashedPayload);
  const stringToSign = getStringToSign(canonicalRequest, requestDate, region);
  const signingKey = getSigningKey(requestDate, region, secretKey);
  const signature = crypto.createHmac('sha256', signingKey).update(stringToSign).digest('hex').toLowerCase();
  return request.protocol + '//' + request.headers.host + path + `&X-Amz-Signature=${signature}`;
}
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["crypto","errors","getScope","isNumber","isObject","isString","makeDateLong","makeDateShort","uriEscape","signV4Algorithm","getCanonicalRequest","method","path","headers","signedHeaders","hashedPayload","TypeError","Array","isArray","headersArray","reduce","acc","i","val","replace","push","toLowerCase","requestResource","split","requestQuery","sort","map","element","includes","join","toUpperCase","getCredential","accessKey","region","requestDate","serviceName","getSignedHeaders","ignoredHeaders","Object","keys","filter","header","getSigningKey","date","secretKey","dateLine","hmac1","createHmac","update","digest","hmac2","hmac3","getStringToSign","canonicalRequest","hash","createHash","scope","stringToSign","postPresignSignatureV4","policyBase64","signingKey","signV4","request","sha256sum","AccessKeyRequiredError","SecretKeyRequiredError","serviceIdentifier","credential","signature","signV4ByServiceName","contentSha256","presignSignatureV4","sessionToken","expires","ExpiresParamError","iso8601Date","resource","query","protocol","host"],"sources":["signing.ts"],"sourcesContent":["/*\n * MinIO Javascript Library for Amazon S3 Compatible Cloud Storage, (C) 2016 MinIO, Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport * as crypto from 'node:crypto'\n\nimport * as errors from './errors.ts'\nimport { getScope, isNumber, isObject, isString, makeDateLong, makeDateShort, uriEscape } from './internal/helper.ts'\nimport type { ICanonicalRequest, IRequest, RequestHeaders } from './internal/type.ts'\n\nconst signV4Algorithm = 'AWS4-HMAC-SHA256'\n\n// getCanonicalRequest generate a canonical request of style.\n//\n// canonicalRequest =\n//  <HTTPMethod>\\n\n//  <CanonicalURI>\\n\n//  <CanonicalQueryString>\\n\n//  <CanonicalHeaders>\\n\n//  <SignedHeaders>\\n\n//  <HashedPayload>\n//\nfunction getCanonicalRequest(\n  method: string,\n  path: string,\n  headers: RequestHeaders,\n  signedHeaders: string[],\n  hashedPayload: string,\n): ICanonicalRequest {\n  if (!isString(method)) {\n    throw new TypeError('method should be of type \"string\"')\n  }\n  if (!isString(path)) {\n    throw new TypeError('path should be of type \"string\"')\n  }\n  if (!isObject(headers)) {\n    throw new TypeError('headers should be of type \"object\"')\n  }\n  if (!Array.isArray(signedHeaders)) {\n    throw new TypeError('signedHeaders should be of type \"array\"')\n  }\n  if (!isString(hashedPayload)) {\n    throw new TypeError('hashedPayload should be of type \"string\"')\n  }\n\n  const headersArray = signedHeaders.reduce((acc, i) => {\n    // Trim spaces from the value (required by V4 spec)\n    const val = `${headers[i]}`.replace(/ +/g, ' ')\n    acc.push(`${i.toLowerCase()}:${val}`)\n    return acc\n  }, [] as string[])\n\n  const requestResource = path.split('?')[0]\n  let requestQuery = path.split('?')[1]\n  if (!requestQuery) {\n    requestQuery = ''\n  }\n\n  if (requestQuery) {\n    requestQuery = requestQuery\n      .split('&')\n      .sort()\n      .map((element) => (!element.includes('=') ? element + '=' : element))\n      .join('&')\n  }\n\n  return [\n    method.toUpperCase(),\n    requestResource,\n    requestQuery,\n    headersArray.join('\\n') + '\\n',\n    signedHeaders.join(';').toLowerCase(),\n    hashedPayload,\n  ].join('\\n')\n}\n\n// generate a credential string\nfunction getCredential(accessKey: string, region: string, requestDate?: Date, serviceName = 's3') {\n  if (!isString(accessKey)) {\n    throw new TypeError('accessKey should be of type \"string\"')\n  }\n  if (!isString(region)) {\n    throw new TypeError('region should be of type \"string\"')\n  }\n  if (!isObject(requestDate)) {\n    throw new TypeError('requestDate should be of type \"object\"')\n  }\n  return `${accessKey}/${getScope(region, requestDate, serviceName)}`\n}\n\n// Returns signed headers array - alphabetically sorted\nfunction getSignedHeaders(headers: RequestHeaders): string[] {\n  if (!isObject(headers)) {\n    throw new TypeError('request should be of type \"object\"')\n  }\n  // Excerpts from @lsegal - https://github.com/aws/aws-sdk-js/issues/659#issuecomment-120477258\n  //\n  //  User-Agent:\n  //\n  //      This is ignored from signing because signing this causes problems with generating pre-signed URLs\n  //      (that are executed by other agents) or when customers pass requests through proxies, which may\n  //      modify the user-agent.\n  //\n  //  Content-Length:\n  //\n  //      This is ignored from signing because generating a pre-signed URL should not provide a content-length\n  //      constraint, specifically when vending a S3 pre-signed PUT URL. The corollary to this is that when\n  //      sending regular requests (non-pre-signed), the signature contains a checksum of the body, which\n  //      implicitly validates the payload length (since changing the number of bytes would change the checksum)\n  //      and therefore this header is not valuable in the signature.\n  //\n  //  Content-Type:\n  //\n  //      Signing this header causes quite a number of problems in browser environments, where browsers\n  //      like to modify and normalize the content-type header in different ways. There is more information\n  //      on this in https://github.com/aws/aws-sdk-js/issues/244. Avoiding this field simplifies logic\n  //      and reduces the possibility of future bugs\n  //\n  //  Authorization:\n  //\n  //      Is skipped for obvious reasons\n\n  const ignoredHeaders = ['authorization', 'content-length', 'content-type', 'user-agent']\n  return Object.keys(headers)\n    .filter((header) => !ignoredHeaders.includes(header))\n    .sort()\n}\n\n// returns the key used for calculating signature\nfunction getSigningKey(date: Date, region: string, secretKey: string, serviceName = 's3') {\n  if (!isObject(date)) {\n    throw new TypeError('date should be of type \"object\"')\n  }\n  if (!isString(region)) {\n    throw new TypeError('region should be of type \"string\"')\n  }\n  if (!isString(secretKey)) {\n    throw new TypeError('secretKey should be of type \"string\"')\n  }\n  const dateLine = makeDateShort(date)\n  const hmac1 = crypto\n      .createHmac('sha256', 'AWS4' + secretKey)\n      .update(dateLine)\n      .digest(),\n    hmac2 = crypto.createHmac('sha256', hmac1).update(region).digest(),\n    hmac3 = crypto.createHmac('sha256', hmac2).update(serviceName).digest()\n  return crypto.createHmac('sha256', hmac3).update('aws4_request').digest()\n}\n\n// returns the string that needs to be signed\nfunction getStringToSign(canonicalRequest: ICanonicalRequest, requestDate: Date, region: string, serviceName = 's3') {\n  if (!isString(canonicalRequest)) {\n    throw new TypeError('canonicalRequest should be of type \"string\"')\n  }\n  if (!isObject(requestDate)) {\n    throw new TypeError('requestDate should be of type \"object\"')\n  }\n  if (!isString(region)) {\n    throw new TypeError('region should be of type \"string\"')\n  }\n  const hash = crypto.createHash('sha256').update(canonicalRequest).digest('hex')\n  const scope = getScope(region, requestDate, serviceName)\n  const stringToSign = [signV4Algorithm, makeDateLong(requestDate), scope, hash]\n\n  return stringToSign.join('\\n')\n}\n\n// calculate the signature of the POST policy\nexport function postPresignSignatureV4(region: string, date: Date, secretKey: string, policyBase64: string): string {\n  if (!isString(region)) {\n    throw new TypeError('region should be of type \"string\"')\n  }\n  if (!isObject(date)) {\n    throw new TypeError('date should be of type \"object\"')\n  }\n  if (!isString(secretKey)) {\n    throw new TypeError('secretKey should be of type \"string\"')\n  }\n  if (!isString(policyBase64)) {\n    throw new TypeError('policyBase64 should be of type \"string\"')\n  }\n  const signingKey = getSigningKey(date, region, secretKey)\n  return crypto.createHmac('sha256', signingKey).update(policyBase64).digest('hex').toLowerCase()\n}\n\n// Returns the authorization header\nexport function signV4(\n  request: IRequest,\n  accessKey: string,\n  secretKey: string,\n  region: string,\n  requestDate: Date,\n  sha256sum: string,\n  serviceName = 's3',\n) {\n  if (!isObject(request)) {\n    throw new TypeError('request should be of type \"object\"')\n  }\n  if (!isString(accessKey)) {\n    throw new TypeError('accessKey should be of type \"string\"')\n  }\n  if (!isString(secretKey)) {\n    throw new TypeError('secretKey should be of type \"string\"')\n  }\n  if (!isString(region)) {\n    throw new TypeError('region should be of type \"string\"')\n  }\n\n  if (!accessKey) {\n    throw new errors.AccessKeyRequiredError('accessKey is required for signing')\n  }\n  if (!secretKey) {\n    throw new errors.SecretKeyRequiredError('secretKey is required for signing')\n  }\n\n  const signedHeaders = getSignedHeaders(request.headers)\n  const canonicalRequest = getCanonicalRequest(request.method, request.path, request.headers, signedHeaders, sha256sum)\n  const serviceIdentifier = serviceName || 's3'\n  const stringToSign = getStringToSign(canonicalRequest, requestDate, region, serviceIdentifier)\n  const signingKey = getSigningKey(requestDate, region, secretKey, serviceIdentifier)\n  const credential = getCredential(accessKey, region, requestDate, serviceIdentifier)\n  const signature = crypto.createHmac('sha256', signingKey).update(stringToSign).digest('hex').toLowerCase()\n\n  return `${signV4Algorithm} Credential=${credential}, SignedHeaders=${signedHeaders\n    .join(';')\n    .toLowerCase()}, Signature=${signature}`\n}\n\nexport function signV4ByServiceName(\n  request: IRequest,\n  accessKey: string,\n  secretKey: string,\n  region: string,\n  requestDate: Date,\n  contentSha256: string,\n  serviceName = 's3',\n): string {\n  return signV4(request, accessKey, secretKey, region, requestDate, contentSha256, serviceName)\n}\n\n// returns a presigned URL string\nexport function presignSignatureV4(\n  request: IRequest,\n  accessKey: string,\n  secretKey: string,\n  sessionToken: string | undefined,\n  region: string,\n  requestDate: Date,\n  expires: number,\n) {\n  if (!isObject(request)) {\n    throw new TypeError('request should be of type \"object\"')\n  }\n  if (!isString(accessKey)) {\n    throw new TypeError('accessKey should be of type \"string\"')\n  }\n  if (!isString(secretKey)) {\n    throw new TypeError('secretKey should be of type \"string\"')\n  }\n  if (!isString(region)) {\n    throw new TypeError('region should be of type \"string\"')\n  }\n\n  if (!accessKey) {\n    throw new errors.AccessKeyRequiredError('accessKey is required for presigning')\n  }\n  if (!secretKey) {\n    throw new errors.SecretKeyRequiredError('secretKey is required for presigning')\n  }\n\n  if (!isNumber(expires)) {\n    throw new TypeError('expires should be of type \"number\"')\n  }\n  if (expires < 1) {\n    throw new errors.ExpiresParamError('expires param cannot be less than 1 seconds')\n  }\n  if (expires > 604800) {\n    throw new errors.ExpiresParamError('expires param cannot be greater than 7 days')\n  }\n\n  const iso8601Date = makeDateLong(requestDate)\n  const signedHeaders = getSignedHeaders(request.headers)\n  const credential = getCredential(accessKey, region, requestDate)\n  const hashedPayload = 'UNSIGNED-PAYLOAD'\n\n  const requestQuery: string[] = []\n  requestQuery.push(`X-Amz-Algorithm=${signV4Algorithm}`)\n  requestQuery.push(`X-Amz-Credential=${uriEscape(credential)}`)\n  requestQuery.push(`X-Amz-Date=${iso8601Date}`)\n  requestQuery.push(`X-Amz-Expires=${expires}`)\n  requestQuery.push(`X-Amz-SignedHeaders=${uriEscape(signedHeaders.join(';').toLowerCase())}`)\n  if (sessionToken) {\n    requestQuery.push(`X-Amz-Security-Token=${uriEscape(sessionToken)}`)\n  }\n\n  const resource = request.path.split('?')[0]\n  let query = request.path.split('?')[1]\n  if (query) {\n    query = query + '&' + requestQuery.join('&')\n  } else {\n    query = requestQuery.join('&')\n  }\n\n  const path = resource + '?' + query\n\n  const canonicalRequest = getCanonicalRequest(request.method, path, request.headers, signedHeaders, hashedPayload)\n\n  const stringToSign = getStringToSign(canonicalRequest, requestDate, region)\n  const signingKey = getSigningKey(requestDate, region, secretKey)\n  const signature = crypto.createHmac('sha256', signingKey).update(stringToSign).digest('hex').toLowerCase()\n  return request.protocol + '//' + request.headers.host + path + 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